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# Field descriptions of zObject

> This reference provides the description of the fields of the zObject object.

This reference provides the description of the fields of the zObject object.

All field names are case sensitive.

<table>
  <tr>
    <th>
      Name
    </th>

    <th>
      Required?
    </th>

    <th>
      Type
    </th>

    <th>
      Description
    </th>
  </tr>

  <tr>
    <td>
      fieldsToNull
    </td>

    <td>
      No
    </td>

    <td>
      An array of String
    </td>

    <td>
      Used to set a list of fields to null. You cannot set a field to NULL if nillable is set to `false` in the WSDL for that field.

      **Values:** An array of field names
    </td>
  </tr>

  <tr>
    <td>
      Id
    </td>

    <td>
      Yes
    </td>

    <td>
      zns: ID
    </td>

    <td>
      This is the ID that all of the IDs in other objects are derived from. Every object has an Id field, which you can use as a unique identifier to perform changes on a specific object.

      **Values:** Cannot edit this field.

      **Character Limit:** 32
    </td>
  </tr>
</table>